Left-Most Derivation Homework Given the grammar -> - -> + * I pyot>-> ) Use a left-most derivation to prove that either is or is not a valid sentence in the provided language. Remember, the characters we use and the labels we give things are arbitrary. The process is always the same. Don't be confused b characters you are unused to or words that have no "normal" meanin I expect you to provide EACH step of the derivation - just the way I do on the slides. Do not skip any steps. After the derivation tell me if this proves the sentence is valid or invalid